Thread-cutter for sewing-machines.



e. HOEPNEFL THREAD CUTTER FOR SEWING MACHiNES.

- APPLICATION FILED Aue.1s. 1917.

Patentw A101. 2.3, 1918.

G EORGEHOEPNER, OF CHICAGO, ILLINOIS THREAD-CUTTER FOR SEWING-MAGI-IINES.

Specification of Letters Patent.

Patented Apr. 23, 191%..

Original application filed Gctober 29, 1916, Serial No. 128,104. Divided and this application filed August 15, 1917. Serial No. 186,253.

To all whom it may concern:

Be it known that citizen of the United States, residing at Chicago, county of Cook, State of Illinois,

ll, GEORGE HOEPNER, a

tubular member 1 is preferably i fitting nicely into the tube so that there will be no lateral play. One end a shaft, 4, forming the rotatable member of the cutter, the shaft have invented a certain new and useful Imof the shaft extends to the notched end of provement in Thread-Cutters for Sewingthe tube and there a large section, prefer- Machines, and declare the following to be a ably more than half the shaft, is cut away full, clear, and exact description of the same, so as to provide a fin or finger, 5, having such as will enable others skilled in the art sharp cutting edges, 6, 6, or at least one to which it pertains to make and use the Sharp cutting edge which, when the shaft same, reference being had to the accompanyis revolved, cooperates with one of the sides ing drawings, which form a, part of this of the notch 2 to shear off any thread which specification. may have been laid across the end of the My invention has for its object to produce tube in the notches.

a simple, novel and eflicient attachment for a The members 1 and 4 are both preferably sewing machine by means of which the made of hardened material of a kind which thread may be quickly and conveniently cut will produce a most satisfactory shearing after a seam has been made. device.

The various features. of novelty whereby The tube is rigidly held in place against my invention is characterized will hereinthe frame of the machine, to which it is atafter he pointed out with particularity in tached, by means of a suitable clamp, 7, the claims; but, for a full understanding of which is so positioned that the shearing end my invention and of its object and advanof the cutter will be brought in proximity tages, reference may be had to the following to the point at which the work leaves the detailed description taken in connection with machine. The shaft l is preferably supthe accompanying drawing, wherein: ported in a suitable bearing, 8, forming part Figure l is a side elevation of my imof or attached to the frame of the sewin proved cutting device and fragments of the machine; there being on the end of the shaft frame of a sewing machine to which the a wheel or pulley, 9, by means of which it device is attached; may be driven. 5

Fig. 2 is a side view of the tubular mem- If desired, a guide plate, 10, having her of the cutter; curved converging lips, 11, may be secured Fig. 3 is an end view looking at the right in proximity to the shearing end of the hand end of Fig. 2; cutter for the purpose of forming a wide Fig. 4 is a side view of the rotatable memmouthed opening or channel into which her of the cutter; and the thread may be brought and guided posi- Fig. 5 is an end view looking at the right tively into the notches in the cutter; thus hand end of Fig. 4. making it unnecessary to give the same My invention is applicable to sewing maamount of attention to the manipulation of chines of any type, but may be. used to parthe thread to be cut that would be required ticular advantage in connection with maif the thread were inserted directly, into the chines adapted for heavy service such, for notches. example, as bag sewing machines of the type While I have illustrated and described illustrated in my application for sewing mawith particularity only a single preferred chine, filed October 29, .1916, Serial N 0. form of my invention, I do not desire to be 128,104, of which the present application is limited to the exact structural details thus a division. illustrated and described; but intend to The cutter comprises a stationary member, cover all. forms and arrangements which 1, in the form of a short tube having in one come within the terms employed in the defiend a notch, 2, which, in the arrangement nitions of my invention constituting the 2113- illustrated, is V-shaped'; and having in the pended claims. same end and diametrically opposed to the I claim; notch 2, a second notch, 3, which, in the ar- 1. A cutter comprising a tube havin a rangement shown, is broader and deeper notch cut in one end thereof, a shaft fitting than the other notch. Revoluble within the revolubly into the tube and projecting into proximity to the end containing the notch,

one side of the shaft atthe end in the vicinityv of the notch being cut away to form a shearing edge adapted to cooperate With the notch. r

2. A. cutter comprising a tube" having notches cut into one end thereof at diametrically opposedpointsa shaft fitting revolubly into the tube and provided With a part having a shearing edge arranged Within the notched part of the tube and adapted to co-v operate with one of the edges of one of said notches to sever a thread extending across the end of the tube and lying in said notches.

' 3. A cutter comprising a tube having a notch cut in one end thereof, a shaft fitting revolubly into the tube and provided with a part having a shearing edge arranged within the notched end ofthe tube and adapted to cooperate with one of the edges of said notch to sever a thread lying in said notch.

In testimony whereof I sign this specification.

GEORGE HOEPNER.

lc'op lea of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. 7 Washington, D. 0. 

